Ensure +[GTMUILocalizerAndLayoutTweaker sizeToFitFixedHeightTextField:] sets an integral size.

 When resizing labels it's possible to get fractional sizes. This CL fixes the problem by using integral values.

DELTA=17  (17 added, 0 deleted, 0 changed)

git-svn-id: http://google-toolbox-for-mac.googlecode.com/svn/trunk@616 7dc7ac4e-7543-0410-b95c-c1676fc8e2a3